NhlNewMarker core dump

I'm wanting to use the NhlNewMarker routine to make a filled square. I'm
following exactly the first example in the documentation for the
function. This works fine on my Mac, but core dumps on Bluefire (NCAR's
IBM AIX). I've simplified this routine to:

load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_code.ncl"

begin
  wks = "x11"
  plotfile = "test"
  vwks = gsn_open_wks(wks,plotfile)
; define a square filled marker for use for each ob
   mstring = "y"
   fontnum = 35
   xoffset = 0.0
   yoffset = 0.0
   ratio = 1.0
   size = 1.0
   angle = 0.0
   new_index = NhlNewMarker(vwks, mstring, fontnum, xoffset, yoffset,
ratio, size, angle)
   print ("marker defined")
end

uname -a AIX be1005en 3 5 00CBF2314C00

bluefire:>ncl test.ncl
  Copyright (C) 1995-2010 - All Rights Reserved
  University Corporation for Atmospheric Research
  NCAR Command Language Version 5.2.0
  The use of this software is governed by a License Agreement.
  See http://www.ncl.ucar.edu/ for more details.
Segmentation fault (core dumped)
bluefire:>

Thanks,
Glen
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Received on Wed Jan 12 11:07:18 2011